1822.] Mr, Lunn on Native Phosphate of Copper, 179 



Rairiy S^cfor Three Years, 



Wet days.* Dry days. Rain in inches. Prevailing wind.* 



1819.— 181 184 23-83 W 



1820.— 137 229 16-16 NW 



1821.— 185 180 ...... 32-51 SW 



Means 167 198 26-165 



Note hy Dr, Forbes. — The rain-guage made use of in Mr. 

 Giddy 's observations is placed on the top of a chimney (not 

 overlooked by any neighbouring buildings) about 45 feet from 

 the ground. The following f are the average results of two 

 guages (the one kept by Mr. Boase, the other by myself) placed 

 on the ground, several hundred yards apart, and also some hun- 

 dred yards respectively, from the site of Mr. Giddy's. A com- 

 parison of their results (which accord very exactly with those of 

 Mr. G.'s), shows their coincidence with former observations of a 

 like kind (see Howard's Chmate of London, vol. i. tab. 66), and 

 points out the absolute necessity of noting the local circum- 

 stances of the pluviameter in every tabular record of the rain. 

 —J. F. 



Article IV. 



Analysis of a Native Phosphate of Copper from the Rhine. 

 By Francis Lunn, BA. FRS. of St. John's College, Cambridge.J 



Among the analyses of Klaproth§ is one of a phosphate of 

 copper from the Firneberg, near Rheinbreitenbach, oh the 

 Rhine : the mineral had long been mistaken for malachite, from 

 its external resemblance. The German chemist obtained as his 

 result 



♦ Wet days comprehend rainy, showery, snowy, and those in which hail fell. 



t March 3-53 



April 2-66 



May 3-5-2 



June 1*55 



July ..1-63 



August 4*71 



September 4'56 



October 5 57 



November. 5*19 



December 9'5I 



Total 42-43 



Two first months of the year not noted. 



t From the Transactions of the Cambridge Philosophical Society for 1821. 

 S BeitrUge zur Chemiscen, iii. 206. 



1^2 



